US/U 2.2 Universal Interface Installation and Operating Instructions

This document provides installation and operating instructions for the ABB i-bus® KNX Universal Interface (US/U 2.2), a 2-channel flush-mounting device that can be parameterized as either an input or output for connecting conventional pushbuttons, floating contacts, or LEDs. It includes technical specifications, safety warnings, cleaning and maintenance guidelines, and commissioning steps using the ETS engineering tool software.